G Suite: Email Sent Rate Information to Gmail

What’s changing: A malicious attack or misconfiguration can cause an unusually high percentage of emails being delivered to a user's mailbox. To protect users in the business, Gmail monitors this percentage of incoming emails, and when it reaches a certain email receiving limit, Gmail automatically sends a opt-out message to the affected accounts.

Google wants to give G Suite admins even more useful information in the process of limiting email rates. In the future, if Gmail rejects >= 25 emails/recipient/hour, Google will send you a list of affected users and their number of rejected messages. To receive this notification, you need Enable email rate limit warning.

Google hopes this list, along with the feature Search email logs, will help you determine why the email is receiving rate limitation and can take appropriate action.

Updated: Gimasys